chapter 3 notes - GENETICS AND EVOLUTIONARY FOUNDATIONS OF...

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GENETICS AND EVOLUTIONARY FOUNDATIONS OF BEHAVIOR- chapter 3 How genes affect behavior Genes never produce/ control behavior directly Genes affect physical structures of the body body interacts w/ environment behavior Genes provide the codes for proteins o Structural proteins form structure of every cell o Enzymes- control rate of chemical reactions in cell o Genes- long molecules of DNA o Protein molecules consist of chains of amino acids o RNA- templates for producing protein molecules Genes work through interaction w/ environment o Food o Exercise o Sex Hot chicks and cool dudes, tortoises Genotype vs phenotype o Genotype- inherited genes o Phenotype- observable properties of body and behavioral traits How genes are passed along in sexual reproduction 23 pairs of chromosomes Egg and sperm cell o Mitosis- replicated itself o Meiosis- cells not genetically alike Chromosome replicates once, divides twice Chromosomes exchange genetic material in a random manner Alleles- different genes that occupy the same locus, and pair w/ each other Mendel o Pea plants o Dominant and recessive John Paul Scott and John Fuller (1965) o Medelian inheritance o Basenji hounds and cocker spaniels o 2 nd generation gets two rr (friendliness) gene Inheritance of behaviors
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